| 1 | FCR | Flying Carpet Air Transport & Services sal | IATA: F8, Callsign: Flying Carpet, IATA designator changed to 7Y* | RL | AVCODES |
| 2 | FCR | Flying Carpet Air Transport & Services sal | IATA: 7Y, Callsign: Flying Carpet, Name changed to Med Airways. IATA designator changed from F8* | RL | AVCODES |
| 3 | FCR | Flying Carpet Company | | | ICAO1 |
| 4 | FCR | Fulton County Ry. LLC | 7/2005 | | NAKINA |
| 5 | FCR | *FALLS CREEK RAILROAD CO. | | | PWRC |
| 6 | FCR | +FULTON COUNTY RWY., LLC | | | PWRC |
| 7 | FCR | Fulton County Railway | | | RSRV |
| 8 | FCR | FULTON COUNTY RAILWAY LLC | | | SCAC4 |
| 9 | FCRD | First Coast R.R., Inc. | 7/2005; added 1/2006 | | NAKINA |
| 10 | FCRD | FIRST COAST RAILROAD, INC. | | | PWRC |
| 11 | FCRD | First Coast Railroad | | | RSRV |
| 12 | FCRD | FIRST COAST RAILROAD INC | | | SCAC4 |
| 13 | FCRG | FARGO CARGO LLC | | | SCAC4 |
| 14 | FCRI | FALCON CARRIERS, INC. | | | SCAC3 |
| 15 | FCRI | FIRST COAST RELOCATIONS INC | | | SCAC4 |
| 16 | FCRK | Falls Creek R.R. Co. | added 1/1984; eliminated 4/1989 | | NAKINA |
| 17 | FCRK | Falls Creek R.R. Co. | eliminated 4/89 | | NRHS |
| 18 | FCRK | FALLS CREEK RAILROAD CO. | | | PWRC |
| 19 | FCRK | Falls Creek Railroad | | | RSRV |
| 20 | FCRL | FLEET-CAR LEASE INC | | | SCAC3 |
| 21 | FCRL | FLEET-CAR LEASE INC | | | SCAC4 |
| 22 | FCRN | FIRST CLASS RENTALS INC | | | SCAC3 |
| 23 | FCRP | FIRST CHOICE RPM INCORPORATED (1ST | | | SCAC3 |
| 24 | FCRP | FOREST CITY FIRE PROTECTION LTD | | | SCAC4 |
| 25 | FCRQ | F C R TRUCKING | | | SCAC3 |
| 26 | FCRR | FEDERAL CARRIERS INC | | | SCAC3 |
| 27 | FCRU | FINNLINES PLC | | FIN | BIC |
| 28 | FCRU | FINNCARRIERS A B, OY | | | SCAC3 |
| 29 | FCRU | FINNLINES PLC | | | SCAC4 |
| 30 | FCRX | Franklin Creek Refining Corp. | 7/1930-4/1947 | | NAKINA |
| 31 | FCRX | Franklin Creek Refining Corp. | Apr-38 | | NRHS |
| 32 | FCRX | FRANKLIN CREEK REFINING CORP. | | | PWRC |
